在spring2.0中使用自定义属性编辑器

当以一个字符串值来设置bean属性时，Spring IoC 容器最终使用标准的JavaBean PropertyEditor来将这些字符串转化成复杂的数据类型。Spring预先注册了一些PropertyEditor(举例来说，将一个以字符串表示的Class转化成Class对象)。除此之外，Java标准的JavaBean PropertyEditor会识别在同一包结构下的类和它对应的命名恰当的Editor，并自动将其作为这个类的的Editor。
比如
Address类有一个PhoneNumber属性
package com.springinaction.propertyeditor;

public class Address {
?private PhoneNumber phoneNumber;

?public PhoneNumber getPhoneNumber() {
??return phoneNumber;
?}

?public void setPhoneNumber(PhoneNumber phoneNumber) {
??this.phoneNumber = phoneNumber;
?}

}
PhoneNumber类：
package com.springinaction.propertyeditor;

public class PhoneNumber {
?private String areaCode;
?private String prefix;
?private String number;

?public PhoneNumber(String areaCode, String prefix, String number) {
??this.areaCode = areaCode;
??this.prefix = prefix;
??this.number = number;
?}

?//省略getter和setter,toString()方法

}
PhoneNumberEditor类：
package com.springinaction.propertyeditor;

import java.beans.PropertyEditorSupport;

public class PhoneNumberEditor extends PropertyEditorSupport {

?@Override
?public void setAsText(String text) throws IllegalArgumentException {
??// TODO Auto-generated method stub
//??super.setAsText(text);
??String stripped = strippedNonNumber(text);
??String areaCode = stripped.substring(0,3);
??String prefix = stripped.substring(3,6);
??String number = stripped.substring(6);
??PhoneNumber phone = new PhoneNumber(areaCode,prefix,number);
??setValue(phone);
?}
?public String strippedNonNumber(String original){
??StringBuffer allNumbers = new StringBuffer();
??for(int i=0;i<original.length();i++){
???char c = original.charAt(i);
???if(Character.isDigit(c)){
????allNumbers.append(c);
???}
??}
??return allNumbers.toString();
?}
}
配置文件：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
?xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
?
?
?<bean id="address" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
?xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

?<bean id="customEditorConfigurer"
??encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
?xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

?<bean id="editorRegister" />
?<bean id="customEditorConfigurer"
??/>
??</property>
?</bean>
?<bean id="address" class="com.springinaction.propertyeditor.Address">
??<property name="phoneNumber">
???<value>800-900-6789</value>
??</property>
?</bean>
</beans>
添加的PhoneEditorRegister类代码如下，它实现了PropertyEditorRegistrar，注册了PhoneEditor。
package com.springinaction.propertyeditor;

import org.springframework.beans.PropertyEditorRegistrar;
import org.springframework.beans.PropertyEditorRegistry;

public class PhoneEditorRegister implements PropertyEditorRegistrar {

?public void registerCustomEditors(PropertyEditorRegistry registry) {
??
??registry.registerCustomEditor(com.springinaction.propertyeditor.PhoneNumber.class,
????new PhoneEditor());
?}

}
测试类修改如下：
package com.springinaction.propertyeditor;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

public class PropertyEditorTest {
?public static void main(String[] args) {
??ApplicationContext context = new ClassPathXmlApplicationContext(
????"com/springinaction/propertyeditor/editor.xml");
??Address address = (Address) context.getBean("address");
????System.out.println(address.getPhoneNumber());
?}
}
这时在运行测试类，字符串类型的值800-900-6789就可以成功转换成PhoneNumber类型了，控制台会输出800-900-6789。